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JavaScript - Set A Null Input To Zero
I'm guessing this question will be one of the easiest questions ever posted but I'm just not getting this fix. I have a simple Javascript program that calculates a users pace for their run. The inputs are done through an HTML Form.
The user can input hours, minutes, & seconds of their run. Then the distance number & measurment. Then finally the pace desired. I am having some trouble with null values in this program. If I input a 0 in hours and then fill everything out the program works great. 100%! But, if I leave the field blank and hit calculate I get a NaN. I'm guessing I need some kind of statement like if this value is null set it to zero but I am not having any luck with exactly what kind of syntax I need. So here is the code, again not very complex, any help would be greatly appreciated! function calculateTime(){ var time_hour = parseInt(document.getElementById("time_hour").value); var time_min = parseInt(document.getElementById("time_minute").value); var time_sec = parseFloat(document.getElementById("time_second").value); var dist_num = parseFloat(document.getElementById("dist_num").value); var pace_choice = document.getElementById("pace_choice").selectedIndex; var dist_choice = document.getElementById("dist_choice").selectedIndex; var total_sec = (time_hour * 3600) + (time_min * 60) + (time_sec); // Then I'm guessing my if statement would go here somewhere? Similar TutorialsHi I am having trouble with a script. I cannot figure out why I get the message: error: null is null or not an object (In IE8) The site is: www.rayburns.com I have check the javascript for the navigation bar and for the rotating images and cannot see what is missing. Not sure what is not being called. Can someone please help with this. Thank you in advance! Hi i have done some reading on the net today because i am getting an error on ie. I did find the javascript twice in my code, once in the header and once here, so i removed it from the header. I also changed to src to the full url. But i am still getting this and i dont know why. the file is located in the root directory. Code: Webpage error details User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; SearchToolbar 1.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; msn OptimizedIE8;ENUS) Timestamp: Sat, 30 Jul 2011 16:03:05 UTC Message: 'null' is null or not an object Line: 8 Char: 3894 Code: 0 URI: http://www.mysite.com/swfobject.js Code: <script type='text/javascript' src='$CONST_LINK_ROOT/swfobject.js'></script>
<script type='text/javascript'>
var s1 = new SWFObject('player.swf','player','400','300','9');
s1.addParam('allowfullscreen','true');
s1.addParam('allowscriptaccess','always');
s1.addParam('flashvars','file=$CONST_LINK_ROOT/movies/$sql_array->vid_id.flv');
s1.write('preview');
</script>
<embed src='$CONST_LINK_ROOT/flvplayer.swf?file=$CONST_LINK_ROOT/movies/$sql_array->vid_id.flv&autoStart=false' width='175' height='175' quality='high' type='application/x-shockwave-flash' pluginspage='http://www.macromedia.com/go/getflashplayer'></embed>
would appreciate any suggestions thanks. i was on 1.5 swfobject i did download 2.2 and im guessing all you do is replace the swfobject.js file to upgrade it, but what happened is it gives me this now. Code: Webpage error details User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; SearchToolbar 1.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; msn OptimizedIE8;ENUS) Timestamp: Sat, 30 Jul 2011 16:31:08 UTC Message: 'SWFObject' is undefined Line: 1283 Char: 1 Code: 0 URI: http://www.mysite/video_admin.php?type=v i dont mind going back to the old version i just need to get this working and im soooooooo lost lol ok another update, this is becomming maddening lol. once i have this line in the header php Code: <script type='text/javascript' src='$CONST_LINK_ROOT/swfobject.js'></script> I never have to use it again as long as they header php is included correct? This is what is driving me nuts, im back on 1.5 and it says its undefined Code:
but am in not defining it on this line? ---> var s1 = new SWFObject('player.swf','player','400','300','9');
<script type='text/javascript' src='swfobject.js'></script>
<script type='text/javascript'>
var s1 = new SWFObject('player.swf','player','400','300','9');
s1.addParam('allowfullscreen','true');
s1.addParam('allowscriptaccess','always');
s1.addParam('flashvars','file=$CONST_LINK_ROOT/movies/$sql_array->vid_id.flv');
s1.write('preview');
</script>
Another Update. I am back to the original question. null is null or not an object.. in my search i have found this found a solution. basically Internet Explorer is crappy and doesnt like the setAttribute property so had to change the onchange handler by directly changing the attrbute for the object like so. object.onchange = function() {} i have no idea what they means, does that mean i need to change swfobject.js or does that mean i have to change my xml request. and if it is the swfobject i have no clue what they mean or what lines Hi I've implemented Busybox on a website to display FLV files in a popup player. This works fine, except for the following error in IE (FF is fine) when I close the popup: 'null' is null or not an object I think I've narrowed it down to the following block of code, but am stuck as to what to do from here. Code: var cl = new Element('img',{
'styles':{
width:'24px',
height:'24px',
position:'absolute',
top:'-20px',
right:'-20px',
'z-index':'100000'
},
'src':'bumpbox/closed.png',
'id':'closer'
})
cl.addEvent('click',function(e){
e = new Event(e).stop();
bg.dispose();
$(el).getChildren().dispose();
eff2.start({
'width':[maxw,1],
'height':[maxh,1],
'left': [endleft,middleH],
'top': [endtop, middleV+s]
})
})
The IE error is just giving me line number 1 of the php, but the error, I'm sure, lays in the Javascript. Many thanks I am thinking this should be fairly easy but yet I am not getting far. I want to have a form with a single text imput field for a zip code. Depending on which zip code the user enters will determine which url they will be sent to. If they enter a zip code which is not in the script, they would be sent to a default url. I am also assuming this can be accomplished with javascript. Any help is greatly appreciated. I have a problem with adding new inputs to a form (if and when required), Internet Explorer is fine but in Firefox if any previous input fields are filled when the more button is clicked they get reset to blank. JS: Code: fields = 0;
function addInput() {
if (fields != 100) {
document.getElementById('input').innerHTML += "<input type='text' name='input[]' size='30' />";
fields += 1;
} else {
document.getElementById('input').innerHTML += "<br />Maximum 100 fields allowed.";
document.form.add.disabled=true;}
}
form: Code: <form action="index.php" method="post"> <div id="input"> <input type="text" name="input[]" size="30" maxlength="15" /> </div> <!-- button --> <div id="more"> <input type="button" onclick="addInput()" name="add" value="More" /> </div> <!-- // button --> <input type="submit" name="submit" value="Submit" /> </form> as usual any help is appretiated .. Hi, i want to set an input value to the same value as the input selected from another input on the same form so when the user selects input 1 i want the hidden input2 to get the same value im guessing i use onsubmit because its hidden so there wont be a focus or blur this would be part of the input Code: onsubmit="(this.value = this.othervalue)" othervalue being the other input name="othervalue" is that the correct syntax I know that unlike PHP, NULL in JavaScript must be quoted as a string. Does it matter if you use single or double quote?
I need to check to see if a cookie has been previously created: Code: var startnum = readCookie('a1');
if (document.cookie.indexOf('a1') == -1){
var startnum = "0";
}
Should line 2 be: Code: if (document.cookie.indexOf('a1') == null){
? Does == -1 do the same thing? On my site I have a Javascript error in my FireBug console: Year is 'null' Code: document.getElementById('year').options[i] = new Option(curr_year-i,curr_year-i);
here is my site: http://harveys.blueplanetdns.com/harveys-shop/ New problem, taken from another website I posted this on: Error: Code: Error ``user_node[0].firstChild is null'' [x-] in file ``*url removed*'', line 63, character 0. As you can see it says that the value is NULL although it shouldn't be... Here is the JavaScript which the error refers to: Code: function manageMessage() {
if( receiveReq.readyState == 4 ) { // request complete
var chat_div = document.getElementById( 'chat' );
var xmldoc = receiveReq.responseXML;
var msg_nodes = xmldoc.getElementsByTagName( 'message' );
var n_msg = msg_nodes.length;
for( i = 0; i < n_msg; i++ ) {
alert(i + "," + n_msg);
var user_node = msg_nodes[ i ].getElementsByTagName( 'user' );
var time_node = msg_nodes[ i ].getElementsByTagName( 'time' );
var text_node = msg_nodes[ i ].getElementsByTagName( 'text' );
alert(user_node[0].firstChild.nodeValue);
//Display message
chat_div.innerHTML += user_node[ 0 ].firstChild.nodeValue + "<br />";
chat_div.innerHTML += time_node[ 0 ].firstChild.nodeValue + "<br />";
chat_div.innerHTML += text_node[ 0 ].firstChild.nodeValue + "<br /><br />";
}
}
}
And again, the whole script if you want it... Code: <script type="text/javascript">
//Credits//
//Help: Greg (Gjslick)
//Code example: http://www.dynamicajax.com/fr/AJAX_Driven_Web_Chat_Backend-271_290_291_296.html
// Declare Global Variables
var lastMess;
var sendReq;
var receiveReq;
var mTimer;
// Initialize Global Variables (on page load)
function init() {
lastMess = 0;
sendReq = getXmlHttpRequestObject();
receiveReq = getXmlHttpRequestObject();
mTimer;
}
function getXmlHttpRequestObject() {
if( window.XMLHttpRequest ) {
return new XMLHttpRequest(); // code decent browsers like Firefox, Chrome, Opera, Safari. And IE7+...
} else if( window.ActiveXObject ) {
return new ActiveXObject( 'Microsoft.XMLHTTP' ); //Code for crap like IE
} else {
var statusEl = document.getElementById( 'p_status' );
statusEl.innerHTML = "Status: Could not create XmlHttpRequest Object, please upgrade your browser!";
return null;
}
}
function getMessage() {
//var url = "scripts/get_data.php?uid=<?=$uid?>&m=" + lastMess + "&chat=1";
var url = "testXMLdoc.xml";
receiveReq.open("GET",url,true);
receiveReq.onreadystatechange = manageMessage;
receiveReq.send( null );
lastMess++;
}
function manageMessage() {
if( receiveReq.readyState == 4 ) { // request complete
var chat_div = document.getElementById( 'chat' );
var xmldoc = receiveReq.responseXML;
var msg_nodes = xmldoc.getElementsByTagName( 'message' );
var n_msg = msg_nodes.length;
for( i = 0; i < n_msg; i++ ) {
alert(i + "," + n_msg);
var user_node = msg_nodes[ i ].getElementsByTagName( 'user' );
var time_node = msg_nodes[ i ].getElementsByTagName( 'time' );
var text_node = msg_nodes[ i ].getElementsByTagName( 'text' );
alert(user_node[0].firstChild.nodeValue);
//Display message
chat_div.innerHTML += user_node[ 0 ].firstChild.nodeValue + "<br />";
chat_div.innerHTML += time_node[ 0 ].firstChild.nodeValue + "<br />";
chat_div.innerHTML += text_node[ 0 ].firstChild.nodeValue + "<br /><br />";
}
}
}
</script>
And here is the XML file (test doc for now): Code: <?xml version="1.0" ?>
<root>
<message id="1">
<user></user>
<text>testing stupid chat thing</text>
<time>0000-00-00 00:00:00</time>
</message>
<message id="2">
<user></user>
<text>dsadasfsdfsggsdgrgsdgfd</text>
<time>2010-04-22 19:17:16</time>
</message>
</root>
For some reason i'm getting the error of "length is null". Which is from this . Code: function display_form(id) {
//Create some variables
var html = "";
var container = "form_container";
var menu = load_menu(id, false);
//Get id
for ( var i = 0; i < menu.length; i++ ) {
alert(i);
}
http = getHTTPObject();
http.onreadystatechange = function() {
if ( http.readyState == 4 && http.status == 200 ) {
document.getElementById(container).innerHTML = http.responseText;
} else {
document.getElemenyById(container).innerHTML = "Loading...";
}
}
http.open( "GET", "includes/forms.php?form=" + id );
http.send();
//Watch input fields
//login_listener();
}/*
Here is the function: Code: function load_menu(menu, return_d) {
//Availible menus
var data = [];
data [ 'login' ] = [ 'Login', 'Register', 'Recovery' ];
data [ 'settings' ] = [ 'Profile', 'Account', 'something' ];
if (return_d == false) {
return data[ menu ];
} else {
//Menu container ID's
var cons = Array('menuitem1','menuitem2','menuitem3');
for ( var i = 0; i < cons.length; i++ ) {
document.getElementById(cons[i]).innerHTML += data[ menu ] [ i ];
}
}
}
Extra info: id = login menu = login Bonjour all. I am trying to activate a function once an iframe is closed. so i am trying to use: window.opener.pageUpdate(); which i get an error of Error: window.opener is undefined Source File: https://web111.secure-secure.co.uk/s...js/thickbox.js Line: 270 Which lead me to believe that my parent window has not got a name so i used window.name = "main"; in my parent and window.main.pageUpdate(); in the child and get same kind of error. Could someone please help me out! Hi....I have an error in my script, but idk where it is..... here is the script: Code: <script type="text/javascript">
var browser = navigator.appName;
if (browser=="Netscape") {
document.getElementById(msg).style.display="none";
}
</script>
<div id="msg" style="width:100%;padding:3px;position:fixed;top:0px;left:0px;background:red;">Please install <a href="http://www.mozilla.org/sk/firefox/">Mozilla Firefox</a> to view this page normally.</div>
I am using the following script on an e-commerce site to ensure that not both drop downs cannot be selected at the same time, as well as ensuring one must be selected at all times. Code: <script language="javascript"><!--
function validate(cart_quantity) {
if (((cart_quantity.elements['id[2]'].value == 9999) && (cart_quantity.elements['id[3]'].value == 9999)) || ((cart_quantity.elements['id[2]'].value != 9999) && (cart_quantity.elements['id[3]'].value != 9999))) {
alert('Please select only one option!');
cart_quantity.elements['id[2]'].value = 9999;
cart_quantity.elements['id[3]'].value = 9999;
cart_quantity.elements['id[2]'].focus();
return false;
}
}
//--></script>
The initial value of the drop down is set to 9999 off the bat. The problem with this code is that not all of my product pages have these 2 drop downs so I wanted to try and add in an if statement saying that if id2=9999 and id3 == null then pop up the error. That didnt work because I don't think it can be equal to null if it does not exist on the page. So instead I tried to do the following: Code: <script language="javascript"><!--
function validate(cart_quantity) {
cart_quantity.elements['id[3]'] = 99999;
if (((cart_quantity.elements['id[2]'].value == 9999) && (cart_quantity.elements['id[3]'].value == 9999)) || ((cart_quantity.elements['id[2]'].value != 9999) && (cart_quantity.elements['id[3]'].value != 9999))) {
alert('Please select only one option!');
cart_quantity.elements['id[2]'].value = 9999;
cart_quantity.elements['id[3]'].value = 9999;
cart_quantity.elements['id[2]'].focus();
return false;
}
if (((cart_quantity.elements['id[2]'].value == 9999) && (cart_quantity.elements['id[3]'].value == 99999)))
alert('Please select an option!');
cart_quantity.elements['id[2]'].value = 9999;
return false;
}
//--></script>
I tried to assign id3 a value of 99999 so that on pages that it doesnt get reassigned after (i.e pages it does not exist on) it will still be equal to 99999 and pop up the error according to the second if clause. Unfortunately that did not work either. Is there any other way I can do via javascript? Resolved!
Hi, I'm trying to build this grease monkey script, which runs on all pages, and simply deletes all iframes that have no content loaded in them. I have a hosts file with many ad servers which are blocked. This leaves ugly holes in the page and I am trying to remove these empty iframes. Plz help hi! i know little about programming, or javascript... ...i've set up several lightwindows on a site... ...fine in all browsers except IE (8 for sure, maybe others too...) ...the lightwindows load normally the first time they are clicked, but if they are closed and opened again, on the 2nd or subsequent times the window opens up at the bottom and an extra 'secret panel' (!) appears... ...in it it says, 'Null' on the left hand side, and 'by null', almost like a signature, on the right! The IE error message assoc. with this is: Message: 'null' is null or not an object Line: 5 Char: 5280 Code: 0 URI: http://www.kabeoke.com/swfobject.js And the FF error console (even though it works fine in FF...) says this: Error: $("lightwindow_image_" + i) is null Source File: http://www.p51labs.com/lightwindow/c...ipt.js,html.js Line: 5595 So the error is really specific to IE, and seems to involve javascript... ...can anyone help? Many Thanks I cant figure out why this doesnt work - Firefox says: Error: document.getElementById("test") is null Source File: file:///Users/briantoovey/test.html Line: 10 Code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>Rotating Quotes</title>
</head>
<body>
<script type="text/javascript">
document.getElementById("test").innerHTML = 'eat it';
</script>
<div id="test"></div>
</body>
</html>
Hi, im having a problem loading a webpage inside a frameset. This frameset is inside an iframe. when i click the link in menu, it creates an iframe that load a frameset page (with two frames), the upper frame loads a webpage, this webpage in the body onLoad calls a javascript and passes a name of a webpage that must load in the other frame, the problem im facing is in the javascript, it returns null. this is the code. Code: function doLoad(url) {
var iFrameContent = document.getElementById('iframeContenido');
iFrameContent.document.getElementsByName('statuszone') = url;
return;
}
where 'iframeContenido' is the ID of the iframe that loads the frameset. statuszone is the name tag of the frame where the url must be loaded. this url is in the same domain. why is this null? any suggestions? thanks in advance! |
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